Github user kiszk commented on the issue:
https://github.com/apache/spark/pull/20619
Umm, we still see the following exception in [the
log](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/87523/testReport/)
...
```
Caused by: sbt.ForkMain$ForkError: java.lang.Throwable: null
at
org.apache.spark.DebugFilesystem$.addOpenStream(DebugFilesystem.scala:36)
at org.apache.spark.DebugFilesystem.open(DebugFilesystem.scala:70)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:766)
at
org.apache.orc.impl.RecordReaderUtils$DefaultDataReader.open(RecordReaderUtils.java:173)
at
org.apache.orc.impl.RecordReaderImpl.<init>(RecordReaderImpl.java:254)
at org.apache.orc.impl.ReaderImpl.rows(ReaderImpl.java:633)
at
org.apache.spark.sql.execution.datasources.orc.OrcColumnarBatchReader.initialize(OrcColumnarBatchReader.java:140)
at
org.apache.spark.sql.execution.datasources.orc.OrcFileFormat$$anonfun$buildReaderWithPartitionValues$2.apply(OrcFileFormat.scala:197)
at
org.apache.spark.sql.execution.datasources.orc.OrcFileFormat$$anonfun$buildReaderWithPartitionValues$2.apply(OrcFileFormat.scala:161)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.org$apache$spark$sql$execution$datasources$FileScanRDD$$anon$$readCurrentFile(FileScanRDD.scala:125)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.nextIterator(FileScanRDD.scala:179)
at
org.apache.spark.sql.execution.datasources.FileScanRDD$$anon$1.hasNext(FileScanRDD.scala:106)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.scan_nextBatch$(Unknown
Source)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
Source)
at
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
at
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$10$$anon$1.hasNext(WholeStageCodegenExec.scala:614)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at org.apache.spark.util.Utils$.getIteratorSize(Utils.scala:1834)
at org.apache.spark.rdd.RDD$$anonfun$count$1.apply(RDD.scala:1162)
at org.apache.spark.rdd.RDD$$anonfun$count$1.apply(RDD.scala:1162)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:2063)
at
org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:2063)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87)
at org.apache.spark.scheduler.Task.run(Task.scala:109)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:345)
... 3 more
```
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